Vibration monitoring device of mining elevator

Abstract

The utility model discloses a vibration monitoring device of a mining elevator, which comprises a vibration signal acquisition unit used for acquiring a vibration signal generated by the mining elevator and generating a vibration electric signal; the vibration signal preprocessing unit is used for preprocessing the vibration electric signals generated by the vibration signal acquisition unit; the ADC sampling unit is used for carrying out ADC sampling processing on the vibration electric signals processed by the vibration signal preprocessing unit and generating vibration digital signals; and the signal separation unit is used for carrying out signal separation processing on the vibration digital signals generated by the ADC sampling unit. By monitoring the vibration data of the mining elevator in real time, fault diagnosis and prediction can be effectively carried out, the reliability of equipment is improved, accidents are reduced, and the maintenance cost and the operation cost of the equipment are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration monitoring equipment, in particular to a vibration monitoring device for a mine hoist. Background Art

[0002] Mine hoists are key equipment in the mining industry. They typically consist of a drive unit, hoisting container, hoist transmission, braking system, control system, mechanical system, electrical system, and safety devices. They are primarily used to lift materials such as ore, slag, and coal from underground or at the wellhead to the surface or various material handling systems. They feature highly flexible and adjustable hoisting speeds to accommodate the lifting needs of different materials. Mine hoists also boast high lifting heights and capacities, enabling them to lift materials from wells tens or even hundreds of meters underground.

[0003] Conventional monitoring of mine hoists mainly focuses on operating speed, operating temperature, workload, etc., and there is a lack of safety monitoring methods, especially the lack of vibration monitoring of mine hoists. Therefore, it is difficult to diagnose and predict faults, and equipment failures cannot be discovered in time, resulting in reduced equipment reliability and production efficiency, while also increasing equipment maintenance costs and operating costs.

[0004] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research. The technical solution to be introduced below is produced in this context. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to address the deficiencies of the existing technology and to provide a vibration monitoring device for a mining hoist which can timely detect equipment failures, improve equipment reliability and production efficiency, and reduce equipment operating costs.

[0006] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A vibration monitoring device for a mine hoist, comprising:

[0008] A vibration signal acquisition unit, which is installed in the mine hoist and is used to collect vibration signals generated by the mine hoist and generate vibration electrical signals;

[0009] a vibration signal preprocessing unit, connected to the vibration signal acquisition unit, and configured to preprocess the vibration electrical signal generated by the vibration signal acquisition unit;

[0010] An ADC sampling unit, connected to the vibration signal preprocessing unit, configured to perform ADC sampling processing on the vibration electrical signal processed by the vibration signal preprocessing unit and generate a vibration digital signal;

[0011] A signal separation unit, which is connected to the ADC sampling unit on the one hand and is used to perform signal separation processing on the vibration digital signal generated by the ADC sampling unit and generate a DC vibration digital signal and an AC vibration digital signal; and is connected to the background server on the other hand and is used to transmit the generated DC vibration digital signal and AC vibration digital signal to the background server for analysis and processing.

[0012] In a preferred embodiment of the present invention, the vibration signal acquisition unit is a vibration sensor.

[0013] In a preferred embodiment of the present invention, the vibration signal preprocessing unit includes a first operational amplifier and a low-pass filter circuit composed of a second operational amplifier. The first operational amplifier converts the vibration electrical signal generated by the vibration signal acquisition unit into a single-ended signal and reduces the signal amplitude, and then filters the single-ended signal through the low-pass filter circuit composed of the second operational amplifier.

[0014] In a preferred embodiment of the present invention, the first operational amplifier is an operational amplifier of model TL061IDR, and the second operational amplifier is an operational amplifier of model AD8675.

[0015] In a preferred embodiment of the present invention, the first operational amplifier reduces the signal amplitude of the vibration electrical signal to one third of the original amplitude.

[0016] In a preferred embodiment of the present invention, the ADC sampling unit includes a differential operational amplifier circuit and an ADC sampling chip. The differential operational amplifier circuit performs differential operational amplifier processing on the vibration electrical signal processed by the vibration signal preprocessing unit, so that the vibration electrical signal is converted into a differential signal. The ADC sampling chip converts the differential signal into the required vibration digital signal.

[0017] In a preferred embodiment of the present invention, the differential operational amplifier chip in the differential operational amplifier circuit is a differential operational amplifier chip of model THS4521, and the ADC sampling chip is an ADC sampling chip of model ADS127.

[0018] In a preferred embodiment of the present invention, the signal separation unit includes a dip switch, and the signal type is selected by the dip switch, that is, the collection of the vibration digital signal and the AC vibration digital signal is configured by the dip switch.

[0019] In a preferred embodiment of the present invention, the dip switch is a dip switch of model DSHP06TSGET.

[0020] Due to the adoption of the above technical solution, the beneficial effect of the utility model is that the utility model can effectively perform fault diagnosis and prediction by real-time monitoring of the vibration data of the mining hoist, thereby improving equipment reliability, reducing the occurrence of accidents, and reducing equipment maintenance costs and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural diagram of the present utility model.

[0023] Figure 2 It is a circuit principle diagram of the vibration signal preprocessing unit of the utility model for converting the vibration electrical signal into a single-ended signal.

[0024] Figure 3 The utility model is a circuit principle diagram of a low-pass filter circuit of a vibration signal preprocessing unit.

[0025] Figure 4 The utility model is a circuit schematic diagram of converting a single-ended signal of an ADC sampling unit into a differential signal.

[0026] Figure 5 This is a circuit schematic diagram of the ADC sampling chip of the ADC sampling unit of the present invention.

[0027] Figure 6 It is a schematic diagram of a signal separation circuit of a signal separation unit of the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0029] See also Figure 1 , the figure shows a vibration monitoring device for a mining hoist, which includes a vibration signal acquisition unit 100, a vibration signal preprocessing unit 200, an ADC sampling unit 300 and a signal separation unit 400.

[0030] The vibration signal acquisition unit 100 is installed in the mine hoist and is used to collect the vibration signal generated by the mine hoist and generate a vibration electrical signal. In this embodiment, the vibration signal acquisition unit 100 preferably adopts a vibration sensor model CA-YD-187T.

[0031] The vibration signal preprocessing unit 200 is connected to the vibration signal acquisition unit 100 and is used to preprocess the vibration electrical signal generated by the vibration signal acquisition unit 100. Figure 2 and Figure 3 The vibration signal preprocessing unit 200 includes an operational amplifier U15 and a low-pass filter circuit comprising an operational amplifier U50. Operational amplifier U15 converts the vibration electrical signal generated by the vibration signal acquisition unit 100 into a single-ended signal, facilitating filtering and reducing filtering costs. It also reduces the signal amplitude to one-third of its original value, due to voltage limitations on the back-end ADC chip, which cannot exceed the ADC chip's voltage range. The single-ended signal is then filtered through the low-pass filter circuit comprising operational amplifier U50 to improve signal quality. In this embodiment, operational amplifier U15 utilizes a TL061IDR operational amplifier, and operational amplifier U50 utilizes an AD8675 operational amplifier.

[0032] The ADC sampling unit 300 is connected to the vibration signal pre-processing unit 200 and is used to perform ADC sampling processing on the vibration electrical signal processed by the vibration signal pre-processing unit 200 and generate a vibration digital signal. Figure 4 and Figure 5 The ADC sampling unit 300 includes a differential operational amplifier circuit and an ADC sampling chip U12. The differential operational amplifier circuit performs differential operational amplifier processing on the vibration electrical signal processed by the vibration signal preprocessing unit 200, converting the vibration electrical signal into a differential signal for input into the ADC sampling chip U12. The ADC sampling chip U12 then converts the differential signal into the required vibration digital signal. In this embodiment, the differential operational amplifier chip U11 in the differential operational amplifier circuit is a THS4521 differential operational amplifier chip, and the ADC sampling chip U12 is an ADS127 ADC sampling chip.

[0033] The signal separation unit 400 is connected to the ADC sampling unit 300 on the one hand, and is used to perform signal separation processing on the vibration digital signal generated by the ADC sampling unit 300 and generate a DC vibration digital signal and an AC vibration digital signal. On the other hand, it is connected to the background server 10 and is used to transmit the generated DC vibration digital signal and AC vibration digital signal to the background server for analysis and processing. The background server determines whether the vibration sensor is connected correctly based on the DC vibration digital signal. If the vibration sensor is connected correctly, the DC voltage will drop from the supply voltage to approximately 11V. The AC vibration digital signal is a useful vibration signal. The background server can perform time domain / frequency domain analysis on the AC vibration digital signal, calculate the characteristic value, and issue an alarm based on the characteristic value.

[0034] Specifically, see Figure 6 The signal separation unit 400 includes a dip switch SW, and the signal type is selected by the dip switch SW, that is, the collection of vibration digital signals and AC vibration digital signals is configured by the dip switch SW. When the dip switch SW is set to vibration digital signal sampling, the voltage of the vibration electrical signal passes through the analog circuit, and the voltage signal is transmitted to the ADC sampling chip, and then the ADC sampling chip is transmitted to the backend server 10; when the dip switch SW is set to AC vibration digital signal sampling, the AC vibration digital signal passes through an internal high-precision resistor, and the current signal is converted into a voltage signal, and then transmitted to the ADC sampling chip through the analog circuit, and then the ADC sampling chip is transmitted to the backend server 10. In this embodiment, the dip switch SW uses a dip switch with model DSHP06TSGET.

[0035] The utility model can effectively perform fault diagnosis and prediction by real-time monitoring of the vibration data of the mining hoist, thereby improving equipment reliability, reducing the occurrence of accidents, and lowering the maintenance cost and operating cost of the equipment.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A vibration monitoring device for a mining hoist, characterized in that: include: A vibration signal acquisition unit, which is installed in the mine hoist and is used to collect vibration signals generated by the mine hoist and generate vibration electrical signals; a vibration signal preprocessing unit, connected to the vibration signal acquisition unit, and configured to preprocess the vibration electrical signal generated by the vibration signal acquisition unit; An ADC sampling unit, connected to the vibration signal preprocessing unit, configured to perform ADC sampling processing on the vibration electrical signal processed by the vibration signal preprocessing unit and generate a vibration digital signal; A signal separation unit, which is connected to the ADC sampling unit on the one hand and is used to perform signal separation processing on the vibration digital signal generated by the ADC sampling unit and generate a DC vibration digital signal and an AC vibration digital signal; and is connected to the background server on the other hand and is used to transmit the generated DC vibration digital signal and AC vibration digital signal to the background server for analysis and processing.

2. The vibration monitoring device for a mine hoist according to claim 1, characterized in that: The vibration signal acquisition unit is a vibration sensor.

3. The vibration monitoring device for a mine hoist according to claim 1, wherein: The vibration signal preprocessing unit includes a first operational amplifier and a low-pass filter circuit composed of a second operational amplifier. The first operational amplifier converts the vibration electrical signal generated by the vibration signal acquisition unit into a single-ended signal and reduces the signal amplitude, and then filters the single-ended signal through the low-pass filter circuit composed of the second operational amplifier.

4. The vibration monitoring device for a mine hoist according to claim 3, characterized in that: The first operational amplifier is an operational amplifier of model TL061IDR, and the second operational amplifier is an operational amplifier of model AD8675.

5. The vibration monitoring device for a mine hoist according to claim 3, characterized in that: The first operational amplifier reduces the signal amplitude of the vibration electrical signal to one third of the original amplitude.

6. The vibration monitoring device for a mine hoist according to claim 1, characterized in that: The ADC sampling unit includes a differential operational amplifier circuit and an ADC sampling chip. The differential operational amplifier circuit performs differential operational amplifier processing on the vibration electrical signal processed by the vibration signal preprocessing unit, so that the vibration electrical signal is converted into a differential signal. The ADC sampling chip converts the differential signal into the required vibration digital signal.

7. The vibration monitoring device for a mine hoist according to claim 6, characterized in that: The differential operational amplifier chip in the differential operational amplifier circuit adopts a differential operational amplifier chip of model THS4521, and the ADC sampling chip adopts an ADC sampling chip of model ADS127.

8. The vibration monitoring device for a mine hoist according to claim 1, wherein: The signal separation unit includes a dip switch, and the signal type is selected by the dip switch, that is, the collection of the vibration digital signal and the AC vibration digital signal is configured by the dip switch.

9. The vibration monitoring device for a mine hoist according to claim 8, characterized in that: The dip switch is a DSHP06TSGET dip switch.

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